Self-closing bracelet.



bracelet.

NITEDsrArEs PATENT orrron f WILLIAM MACOMBER, or PROVIDENCE RHODEIISLAND.v f i lSELFcLc s|Ne'BRACELET. l

To all whom it may concern: V

Be it known that I, WILLIAMI. MAooM- BER, a citizen of the UnitedStates, residing at Providence, in the Statel of `Rhode Island, haveinvented a new and useful Improvement in Self-Closing Bracelets, ofwhich the following is a specification. v

My invention consists in the improved construction of thespring-actuated joint of the bracelet, as hereinafter set forth.

In the accompanying drawings, Figure 1 represents a side view of ahollow wire bracelet to which my improvement is applied.

Fig. 2 re resentsan enlarged longitudinal section o` the closedspring-actuated joint, taken in the plane of the arms of the bracelet.Fig. 3 represents a longitudinal section of the same, taken in the lline3 v3 of Fig. 2. Fig. 4 represents a section, as in Fig. 2, with the armsof the bracelet opened. Fig. 5

represents a transverse section taken in the line 5 5 of Fig. 3. Fig. '6represents a side view of the sliding yoke, which serves to hold theactuating-spring of the braceletjoint. Fig. 7 represents an edge view ofthe same. Fig. 8 represents ac' side view of the actuating-spring. Fig.9 represents an edge view of the piece of groovedstock from which thejoint-piecesl are to be formed. Fig. 10 represents a transversesectionof the same. Fig. 11 represents an edge lview showing a properly-bentpiece of stock of sufficient length to make both joint-pieces of a Fig.12 represents the same edge view, showing the portions to be removedfrom the blank shown in Fig. 11 preparatory to the separation 'of thejoint-pieces. Fig. 13v represents the completely-formed jointpilces withtheir inner ends abutting each ot er.

In the drawings, A represents one of the hollow arms of the bracelet,and B the other hollow arm, the said bracelet being provided with theimproved self-closing joint C. The joint-piece D is soldered rmly in thecavity of the` arm A of the bracelet and is constructed as shown in Fig.13, being provided with the perforation c for the pivot t and thecut-away recess c, whichis adapted to receive the projecting lip d ofthe opposite joint-piece E, the said lip d serving to close the innerside of the joint C when the arms A and B of the bracelet are thrownopen, as shown in Fig. 4. To the joint-piece D is pivoted the yoke F,the curved arms e e of which are adapted to slide loosely in the curvedgroovesl ff, formed inthe opposite Patented Juiy'enieoe.: i`

edges vof thejolnt-piece E. The joint-.piece j E is providedwith the vcavity q, which is adaptedv to receive and holdthe actuatingspring G,theouter end of thesaid spring being held in contact with the cross-barh of the said yoke F, so that the expansion of the said spring G willserve lto draw the innerv ends of the joint-pieces D and E forciblytogether, and thuscause the closing of the arms of the bracelet.bracelet arebeing opened, as shownin Fig.' 4, the projecting end L ofthe joint-piece D will act as a lever to cause a drawing action upon theyoke F and the compression of the spring G, the corner j constitutingthe fulcrum for the turning movement.

1 Heretofore in self-closing bracelets of this class theturning-fulcrum'has'been located at the abutting ends c Ic of the hollowarms of the bracelet, with resultingwear and injury; but in my inventionthe wear does not come upon the said hollow arms, but upon thejoint-pieces D and E, which are soldered in the cavities of the saidarms in such a posi- When the arms of the /4 tion that the abutting endsc 7c of the hollow arms A and B lie in about the plane of the centerofthe pivot-pint, as shown in Figs. 2 and 3, whereby when the arms A and Bare being opened the outer edge of the arm A will be drawn inward, asshown in Fig. 4. The projecting end i ofthe joint-piece D bears againstthe face o of the joint-piece E, which face is back 'of the plane of theend of the hollow arm B.

In the manufacture of the joint-pieces D and E,'I'1'irst form a bar H ofsuitable crosssection, having the opposite longitudinal grooves e e, asshown in Figs. 9 and 10, and then bend the said bar in longitudinally-The stock is then cut away at fm, and n to form the jointpieces.

I claim as my invention- 1. In a self-closing bracelet, the combinationof a joint-piece provided with opposite IOO grooves, the yoke held inthe said grooves, 'i

and the actuating-spring, with the opposite joint-piece, pivoted to theyoke and adapted to fu j oint-piece when the arms of the bracelet arebeing opened. v 2. In a self-closing bracelet, the combina'- tion of thehollow arm of the bracelet the joint-piece provided with the grooves,and securedv in the said hollow arm which proy crum upon` the end of thegrooved jects beyond the end of the said joint-piece, and the oppositejoint-piece projecting beyond the end ofthe hollow arm to which it issecured, with the yoke-piece pivoted to the said projecting joint-piece,and held in the grooves of the opposite joint-piece, and theactuating-spring held in the said yoke.

3. In a self-closing bracelet, the combination of the hollow arm of thebracelet the joint-piece provided With the grooves and the provided Witha recess at its inner side adapted to receive the said projecting li andprojecting beyond the end of the hollgow arm to Which it is secured,With the yoke-piece pivoted to the said projecting joint-piece, and heldin the grooves of the opposite jointpiece, and the actuating-spring heldin the said yoke.

WILLIAM I. MACOMBER.

Witnesses:

SOCRATES ScHoLFrELD, 'JOHN S. LYNCH.

